The Atmel 8051 AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 89C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S52 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.
Features:
It is a high-performance CMOS microcontrollers with Flash Technology
The unit operates at a wide range of 4 – 5.5 volts, so it is a low power IC.
The device supports In-system Programming both page and byte mode for the Flash memory.
The operational frequency of CPU is up to 33MHz but can be altered for saving energy.
The module has a quick programming time with 10,000 read/write cycles.
The Random Access memory is organized in 256×8 bits.
The serial communication takes place through a full duplex UART module.
It comes with a reset option, three 16-bit timers and eight interrupts.
AT89S52 has two power modes, i.e., idle mode in which stops processing unit stops while other peripheral keep working and power-down mode that halts oscillator and other functions and save RAM contents.
Specifications:
Compatible with MCS-51® Products
 Original
 8K Bytes of In-System Programmable (ISP) Flash Memory
 Endurance: 1000 Write/Erase Cycles
 4.0V to 5.5V Operating Range
 Fully Static Operation: 0 Hz to 33 MHz
 Three-level Program Memory Lock
 256 x 8-bit Internal RAM
 32 Programmable I/O Lines
 Three 16-bit Timer/Counters
 Eight Interrupt Sources
 Full Duplex UART Serial Channel
 Low-power Idle and Power-down Modes
 Interrupt Recovery from Power-down Mode
 Watchdog Timer
 Dual Data Pointer
 Power-off Flag
Datasheet:
AT89S52 Microcontroller
Applications
Multiple DIY Projects
Very good choice if you are learning ATmel
Projects requiring Multiple I/O interfaces and communications
Replacement for Arduino Module
Package Includes:
1 x 8051 Atmel 89S52 Microcontroller
Pinout Diagram:
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